Actually, there is: Apple sometimes drives sales. Unfortunately, there is no way to know when it happens to something you want to buy. Your only option? Check iTunes regularly and hope you don't have a limited time offer.
Thankfully, there is another solution: TunesGenie is a free iOS app that lets you build a wish list of albums, audio books, e-books, movies and TV shows you want to buy, so you will notify when it is available a price decline.
I dream of deal-genies
In the case you wonder if the name, TunesGenie started as an album tracker. But then the developer expanded the scope to include books, movies and TV. (Oh, it no longer traces apps. If you want this feature, there is another way to get.)
Once you've started the app, tap Search and enter the name of an item you want to track, followed by the appropriate category: Movies, TV Shows, Music, Books or Audiobooks. When it appears in the search results, press the plus sign to add it to the wish list. Repeat if necessary for additional items. Then press wish list to see everything you track.
In the wish list, you can press the toggle icon to switch between HD and SD versions of movies and TV shows, like
There is another way to build your list: If you browse directly in the iTunes Store, you can click the Share button for any item and select Add to TunesGenie . (If you do not see the option, press More and enable it from the Activity list.)
And that's all there is. When there is a price drop on something you've tracked, you'll know.
Browsing for dollars
TunesGenie also has a discount tab: Tap it and then select a category for a list of everything that is currently for sale. For example, on this writing, the classic Comic Airplane! and Harold and Maude are priced at $ 4.99, down from their usual $ 14.99. And Jack Reacher's novel No middle name is $ 2.99 (regularly $ 9.99).
If you hope for an even better sale, you can add items to your wish list from this page.
Finally, all lists here can be sorted by discount date, percentage or number, just by tapping an icon in the corner. If you want to know, for example, which items have seen the largest price drop, switch to the percentage view.
Although the app is free, TunesGenie earns affiliate revenue when you buy something (which you can do by tapping it from the app). The developer Frank Barret generously donates a whole 50 percent of these revenue to one of several valuable charities: Water.org, the Wounded Warrior Project and the like. How to find and buy digital offers in this way is a great win-win.
Originally published February 23, 2017.
Update, March 3, 2019: Added new information.